You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="IPbanning.jpg|99" />
  </query-continue>
  <query>
    <pages>
      <page pageid="84" ns="0" title="How does the Internet actually work?" />
      <page pageid="85" ns="0" title="What is Internet surveillance?" />
      <page pageid="95" ns="0" title="Encrypted connections" />
      <page pageid="99" ns="0" title="Internet Censorship" />
      <page pageid="104" ns="0" title="Information storage" />
      <page pageid="105" ns="0" title="Destroying data" />
      <page pageid="107" ns="0" title="Email spoofing" />
      <page pageid="110" ns="0" title="Mobile profiling and surveillance" />
      <page pageid="141" ns="0" title="IP forensics" />
    </pages>
  </query>
</api>